Originally, the R3s were advertised as having a detachable cable. Since their permanently attached cables are said to be unusually durable and robust, only one problem seems to remain (assuming the earpiece connectors never come loose): The ability to swap an inline mic cable for the standard one. This option would be crucial for a preorder's mobile use.
It looks as though you can't preorder the R3 in a headset version, which means that being out and about and wanting to accept a call would involve a cumbrous headset attachment from a third party (which, in practice, I despise).
I'd have preordered the R3 and the Delta (the latter for my grillfiend) if inline mic versions were offered or the cable really were detachable.
Re the consistent claim that the R3 and Delta are "unrefined" -- that's a rather vague adjective to use. What do you mean by unrefined exactly, and when you talk about the Deltas, are you comparing them to other IEMs in their price range?
I'm not interested in the S1 personally, but if I were, I'd demand an inline mic, because the bassier signature seems designed for headset use in noisy environments.
It's very vague right now as I wrote that with about 20 minutes in on both IEM's. Just impressions.
I will go into more depth here like I would in a review. Because you are right, in both times, 'unrefined' meant exactly two different things and needed clarification which would go into a formal review.
In terms of the R3, it is unrefined compared in the sense that while it is going for a clear and neutral sound, it isn't reaching that because the mids don't have the clarity, bass is a bit off set in terms of how it sounds and the positioning of the entire sonic sequence(due to the soundstage created from the 'vortex chamber' in the R3). And thus, when compared to something like say a Tzar 350 or the clearness of the LCD3 (not exactly a clear champ here, but still reference) the R3's lose out on getting that plaque due to the afformentioned problems above. Not bad for $100-$120 though as it isn't harsh. I would rather the mids lose out on clarity and highs that don't shine as much as compared to an upper mid spike that makes me want to tear my eyes out. So yes, these drivers have been tuned and its doing great in terms of how BW balanced the 'vortex' chamber so it maintains clearness and realizing that possibly trying for more clarity(in the mids) might also increase harshness(in mids and highs). R3 L and R is very very annoying to find as it is very small indicator in a really weird place. However since the molded ear pieces are obviously molded and shaped for one ear. It only takes a moment to realize which piece goes into which ear.
In terms of the Delta, it is a very off putting earphone. It produces the sonic frequencies like they should come out. This basically means that the mids are present and forward with notable highs, and a pronuncable bass. However past that, its unrefinement comes in just how it presents the frequencies. The sound is thin. For a visual/sonic image of 'thiness'. Early generation or fake Apple Earbuds(not earpods) are a good description in that while it has frequencies and how those freqs should act. The sound is very compressed together(thin) and with having an airy(lots of space) presentation. The delta's are by no means bad. The unrefinement is mainly just from the thin-ness in it. Everything else is pretty awesome considering the price of these. The soundstage is extremely wide adding to the airy-ness. The upper mids do have a slight sparkle(slight spike in fr) but it is not harsh and is tuned quite well to give it an edge without too much. Basically, frequencies are absolutely good. Tuned quite well with forward vocals with pretty good clarity for the price along with good low and high ends that aren't problematic in quality. However, the thin-ness of the sound which creates the airy presentation is the biggest problem. Airy is loved by many people, a thin sounding earphone however is not exactly a fine quality. But for $20, this is pretty good. Most are thin in this price range AND can't get the frequencies right. The plethora of eartips, build quality of the housing and cables with good strain reliefs and even a foam earpiece(not Comply) is of great surprise to me. The L and R is a bit hard to find. It is of adequate size, but the fact that the two buds are the same colors and identical in terms of housing(some angle the housing or different colors) does make it annoying.
Let me know if you want elaboration on any points for any additional info.